import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Test17 {
    public static void main(String[] args) {
        ExecutorService service = Executors.newFixedThreadPool(10);
        for (int i = 0; i < 20; i++) {
            int tmp = i;
            service.submit(new Runnable() {
                @Override
                public void run() {
                    System.out.println(tmp);
                }
            });
        }
    }
}
